ACR program can't access CDROM under WINE

[Paul]

I have this windows program; call it ACR. Its very simple I think.....though 
I'm not a programmer. It's an educational program and mostly involves pulling 
up images and documents off of a CD. 

I have the latest WINE from codeweavers installed. It seems to run 
wordpad.exe, cdplayer.exe and even the ACR installation of the disk works 
perfectly. The config file looks OK to me. 

 So I run my program: wine /mnt/win_c/acr/acrgu/acrlf_gu.exe 

 Wine starts up like its doing something. 

 Error Message: File not found: ':\acr\gu\images\gu2.bmp' 
(exact syntax) then I hit the OK button and the program quits.
This directory/file is on the CDROM which I can access and appears to be 
correctly setup in the config file. 

 Any ideas? Just seems like there ought to be a way to help it see those 
files. 
All suggestions gratefully accepted. 
Thanks.