Yes, deadskirts.com owner has deleted most of older topics recently.
All I can do right now - is just to give a very brief guide about such a mod:
1) Download and install "OPEN IV" software (GTA/MAXPAYNE resource editor)
2) With a help of "OPEN IV" look into game resource files "pc/models/cdimages/speds1.rpf" & "speds2.rpf" and find there female models according to your tastes (each model's main file has *.wdd extension and can be viewed by OPEN IV).
3) By the same way find male enemies models files and replace them with female models, keeping filenames of male models. Each model consists of at least 3 files with extensions *.wdd, *.wtd & *.wft - they should be replaced altogether.
Example:
1) inside "speds1.rpf" find files "fabi_club.wdd", "fabi_club.wft", "fabi_club.wtd", save them with "Extract..." on the right click - thats Fabiana model wearing miniskirt in club
2) go to "speds2.rpf", turn on "Edit mode" (F6), find files "h_crac_sold_a.wdd", "h_crac_sold_a.wft", "h_crac_sold_a.wtd" and replace them with previously saved Fabiana's model files by pressing "Replace" in menu on the right click.
3) do the same for "h_crac_sold_b.*" & "h_crac_sold_c.*" sets of files
4) run the game, load chapter 12 (abandoned skyscraper) and let Fabianas die!
edit "peds.ide" to make replaced models sound as females, edit "filtersets.xml" to turn off face bones animation in order to avoid face distortions.