Hi Can someone help with the following

1 What format of music can i play on my N770

2 ditto Video

3 How do i install applications I have downloaded , for instance, gpe-clock-0.25.tar.gz when i double click on it the message comes up 'unknown file type'

do i need some master piece of software very confusing at my wits end

4 Also my N770 links great with my phone can view pictures on my memory card over bluetooth on the N770 but when i try to connect on my ISP dial up from the N770 to my Sony ericsson phone it starts dialling then stops with the message

network connection error - am i doing something wrong

I like the N770 but never had this trouble with windows based pda's !

Hope you can help thanks