I found solution for two of my problems:

No1: During startup, screen "iGO loading..." stays for almost a minute
Solution: Delete any unnecessary license files. Using files from post #155 at [Only registered and activated users can see links. ], solved this problem. Now it loads in less than 20 secs.

No2: Big lag
Solution: A ux file is not working well. I spent more than a day searching for this file. For me, ttspro.zip seemed to be the problem. Without it, everything was fine. After a lot of search, I found that the real problem was not the ttspro.zip file itself, but the voice file for tts!!! I changed it and now everything runs smoothly!!!

Hope this is gona help people with same problems