Hi,
To transfer an IAR to a Ride project you need to create a new project in Ride7 and copy on it all the source file.
If everything is in c it should be easy but if you have some assembler code, you have to transcript all and that can be complicated.
You should also try to set the options in Ride7 like (or approaching) to the setting of the IAR project.
If you need just to debug the application, you can just copy the .elf file from IAR project and debug with Ride7.
Regards,
Etienne