Hello there. I would just like to thank you for the feedback you gave me on my mod which has helped it reach the final release! Your contribution of being one of three people to point out what little sense it made for the Core to just sorta "appear," at the Black Space, and critiques on my third credit art illustration have sped up the debugging process. Thank you!
Unfortunately, I've never really messed around with porting mods to CS+, with or without Plus Porter.
All I can say is, Curly's Past did not involve any ASM hacking, so as long as you take care of the modified sprites (and that one music in the pyramid), it shouldn't behave any different from any other mod.