Ok Experts How do i fix this error in hl1

[rhodeder]

Ok i been trying to make a good retexture of a mod called mastersword and have been using 512x512 textures. It was doing fine until i got a error from using them too much. The error states Alloc : Block Full i am guessing that means that it was alocating above its limit and i need to know how i can edit hl1 so it can allocate more since computers can these days.

-Derek