Hi guys, this game is getting old in such a bad way, and the DOXBOX version need tweaking and works pretty bad. So I am going to write a short for "dummies" (like me) tutorial for make 
Redneck Rampage Collection work better and in a more simple way.   
FIRST STEP - Download this mod: It´s not finished at the 100% but compare with the issues that the vanilla game have, is frankly speaking, a much better option.   
http://jonhunt.com/redneck/other/erampage_096_win32.zip   Source/website: [url=http://jonhunt.com/redneck/erampage.htmlhttp://jonhunt.com/redneck/erampage.html[/i[/url]]   
SECOND STEP - Once that mod/launcher installed, unrar it to a new Redneck folder (not to the Redneck Rampage Collection one)   
THIRD STEP - To not complicate things much, 
I will imagine you want to play the THREE games included in the collection, so we need to do as next. You need to find this GRP files on your Redneck Collection original folder, NOT in the new one you created   Get the REDNECK.GRP supplied with the Rides Again, put it into the main dir (where the Erampage.exe is). 
 Then get the REDNECK.GRP supplied with the original Redneck Rampage, put it into the two [!] directories: REDNECK and ROUTE66.   
Source: ERAMPAGE_096.txt included in the mod/launcher you downloaded previously.   FOURTH STEP - Now it comes the most tricky part: Normaly you could use the RT66.GRP file in the retail version of Route66, but is included in the GOG version in a different way. So you need a GRP file managing program, and do some "handy" work.  
 Creating your own RT66.GRP file if you purchased the GoG.com version of Redneck Rampage:  
 4.1) If you do not already have a .GRP editor, download one. The link the tutorial I found is broken, but I will recommend use this GRP file manager that is VERY EASY to use 
http://www.dukertcm.com/knowledge-base/downloads-rtcm/duke3d-tools-grp/gfs31.zip   4.2) Create an empty folder to copy/move all the necessary files you will need so that things will be easier to look at.  
 4.3) Navigate to your Redneck Rampage GoG.com folder, (The collection one, not the one you installed the launcher we are moving the GRPS) probably "C:\Program Files (x86)\GOG.com\Redneck Rampage Collection\Redneck Rampage\"  
 4.4) Go ahead and copy all of the .MAP files (14 total) out of the ROUTE66 subfolder and place them in your new empty folder. We will come back to these.  
 4.5) Go back to the Redneck Rampage (one level above the ROUTE66 folder) and copy the following files into your new empty folder that you just copied all the .MAP files into: 
 END66.ANM 
 TURD66.ANM 
 TILESA66.ART 
 TILESB66.ART 
 BUBBA66.CON 
 DEFS66.CON 
 GAME66.CON 
 GATOR66.CON 
 PIG66.CON 
 USER66.CON 
 PALETTE.DAT 
 END66.VOC 
 G_BITE.VOC 
 G_SIT.VOC 
 NEON.VOC 
 TURD66.VOC  
 4.6) We are now going to be working soley in the folder we created earlier. It should now contain 30 files total.  
 4.7) Rename TILESA66.ART to TILES024.ART and TILESB66.ART to TILES025.ART  
 4.8) Rename every map file! 
 START.MAP -----> E1L1.MAP 
 CARNIVAL.MAP --> E1L2.MAP 
 TRUCKSTP.MAP --> E1L3.MAP 
 BREWERY.MAP ---> E1L4.MAP 
 FLEA.MAP ------> E1L5.MAP 
 SLAUGHTER.MAP -> E1L6.MAP 
 MINIGOLF.MAP --> E1L7.MAP 
 GAS.MAP -------> E2L1.MAP 
 RANCH.MAP -----> E2L2.MAP 
 COFFIN.MAP ----> E2L3.MAP 
 CAMPY.MAP -----> E2L4.MAP 
 BIGFOOT.MAP ---> E2L5.MAP 
 HOOVERDAM.MAP -> E2L6.MAP 
 ALIEN.MAP -----> E2L7.MAP  
 4.9) Open your .GRP editing program and create a .GRP with all 30 files from the folder we created. Name it RT66.GRP  
 4.10) Place RT66.GRP we just created into your ROUTE66 folder in your Erampage installation folder, and voila! We are done!   
Source: [url=http://jonhunt.com/redneck/other/gogrt66grp.txthttp://jonhunt.com/redneck/other/gogrt66grp.txt[/i[/url]]   
STEP 5: Configurate and PLAY!!! During Erampage Setup select 'Custom game content directory' named RIDESAGAIN to play Rides Again or REDNECK to play Redneck Rampage or ROUTE66 to play Route 66. ENJOY!!