1.  Using FTP's

Don't know how to use FTP but want to learn?
Trust me, it pays off once you've learnt.

The illustrated tutorial below covers Downloading, 
Setting Up and Basic Usage of a free FTP program called SmartFTP

Click Here

2. Serving

Basic illustrated guide to setting up Bulletproof FTP server
Click Here

Very useful forum post I found
Click Here

3. Advertising to iRC channel

I use a simple addon for mirc that does all the hard work.
You can download it here

Or you can read and learn the below info

Using the /timer command in mIRC type something like the following:
/timerX Y Z /msg #channel YourAdvert

X = Name for timer, leave no spaces!
Y = The number of times to repeat, zero repeats forever
Z = Delay. This is a value in seconds. 300 seconds is 5 minutes.
Recommended: 10-15 mins apart MIN

Eg: /timerFTP 0 900 /msg #Chan [FTP Online] [Details:*** ]