Is there like a temporaray Yahoo Messenger program

like AOL Instant Messenger has AIM (AOl Instant Messenger) Express

AIM Express is not the actual instant messenger but it opens up on a separate window and its temporary and the program is not saved on the computer but it works via internet explorer or firefox or whatever internet browser

Is there one like that for yahoo messenger?

This is the last week of summer school for me and I’m workin on a 20 page research paper and my laptop is messed up so I go the library (which is where im at right now) and work on things….I want to have Yahoo Messenger as well so that I can talk with my friends (for proofreading and help) and give myself a break once in a while when im here for like 5-6 hrs a day

I would really appreciate your help

Thanks!