What would really help me is custom string literals (which were introduced with the new C++0X standard). I need this to easily convert IDs to resources.

print(4); // returns 4
print(4r); // returns resource with id 4

I don't think you are going to implement this anytime soon (if ever) but I propose it anyways.
See C++0X faq on how it is handled in c++
see here

It's not a bad suggestion, and goes in line with the script engine being highly flexible/customizable.

I don't make any promises, but I'll add this to the to-do list so it won't be forgotten.