In gmail users can change the theme's of the chat, which it would make the chat system more personalized if users could select the templates which you have installed in freichat. Perhaps in the additional options button in the chat bar it could be placed.

Its a very good idea , I too was thinking of adding this feature to freichat , but i was not getting
time for the same.

I will try to add the feature in the next version of freichat .

I am only confused about where exactly to give the option .

It should be added in the button called "Additional Options" which currently only has "restore positions". The icon looks like this:
http://www.hikrs.com/freichat/client/jquery/freichat_themes/BrowntoGreen/tool.png

I am very pleased to hear the interest, this would make freichat even cooler! :-D