UPDATE: I tried to find another way to convert the .x files to .smx. I discovered a program that should be able to achieve this, through conversion to .egg and .bam files. I followed the steps, but I kept getting error about OpenGL. I suppose that's the reason why the game doesn't convert the files in the first place. Therefore, I would greatly appreciate if somebody found the time to help me out here, and downloaded the playerfemale01.x and playerfemale01l.x files uploaded here in the opening post:
topic29-27376.php and then followed these instructions to see if the game can actually convert the files:
1) create this folder, if it doesn't exist : Data\Models and then put the downloaded .x files there
2) in Tennis.ini, under [3dEngine], change this line from :
ConvertToSmx = 0
to :
ConvertToSmx = 1
3) Launch the game ; select "High" for "Player Details" in the Video menu
4) Look the Character sheet of a Female player
5) You should get 2 .smx (for high & low details) in Data\Models
6) Exit game & set back :
ConvertToSmx = 0
Thanks in advance to anybody who's willing to help me resolve this.