1) What size textures are you using? Using TGAs will require more memory than PCXs.

2) Remove all level_load, ent_create code, nexus settings and max_entities settings. The amount of memory used should be less than 50Meg. Work your way up from there by adding ent_creates and level_loads in and check memory usage. You should get an error message if you are exceeding limits.

3) Do your customers a favor and forget about the 1 week release date; if you are losing memory somewhere and don't know where it's obviously not at a release stage yet. A (c) sign is not necessary to have copyright though it is helpful of course.