I've got Rayman running off D drive but when I try to install it I get "0 free mb" preventing the installation. I've tried raising the memory in the Dos Box config but it didn't help.

I'm on a Toshiba Sattellite L500 laptop with 4gb of ram (2.87 usable), pentium dual core T4300 at 2.10ghz and another 300gb free on my hard drive.

DosBox is 0.74 but you can see that in the picture. I've been following the tutorial for DosBox but where it said to find the exe in the root folder all I found was the installer. Typing D:\RAYMAN>INSTALL got me to the picture so I don't know if doing that instead of having a .exe has caused the problem.