I have a few questions about timers in CPMA. I'm fairly new to Quake 3, so bare with me.

My friend who plays Q2 tells me that timers are just wav files that people make. He also said that timers are accepted among the community. He gave me a link to some Q2 timers but they all pretty much sucked in my book. I thought of making my own but I have a few questions first.

Are timers aloud in leagues and/or tourney?
Do people frown upon timers in pickups and such?
How do timers work, are they like in Q2?
Can you use timers in Quake Live atm?
Where could I get some for dueling?
What are the spawn times for items?
Whats the best way to use timers? E.g., what to bind them to, when to activate them, tips, etc.

Thanks for helping out a newb. :)