Advanced options of a Wifi USB device

Hi everyone,

I have a USB device with a Realtek 8187 chip (It's an Encore ENUWI-
G2).
I'm trying to figure out what this options do, and if its recommended
to leave it enabled or disabled:

- Frame Aggregation
- IBSS Default 11b Mode
- Rate Adaptative

And also i wanna know if this values are all right:

- Fragmentation Threshold: 2346
- Long retry limit: 7
- Maximum packet size: 1514
- Power save mode: Fast_PSP
- RTS Threshold: 2347
- Short Retry Limit: 7
- SSID: any

I'm using MS Windows XP SP2, and i'm using this in a PC not a laptop.

Thanks for your time.

Cheers.

PS: sorry my english