Forums / Cotonti / General / Sienna plugins

Well, You'd think that it would work, but as example I will use the minichat plugin:

Fatal error: Cannot redeclare minichat_build() (previously declared in F:\xampp\htdocs\test\sienna\plugins\minichat\inc\minichat.functions.php:25) in F:\xampp\htdocs\test\sienna\plugins\minichat\inc\minichat.functions.php on line 154

AS I am no php programmer, I have no clue how to solve these kinds of errors. Can these kinds of error be fixt with a work around, or should I just let the old plugins be the old plugins?
 

I understand why the plugin authors don't feel the need to upgrade all their stuff, but isn't that a bad thing for Cotonti itself?  I mean, you now have two branches, genoa and sienna. Genoa has a big load of plugins, but Sienna only has (atm) 3 or 4. You all have worked hard to get genoa to sienna and now you basically are telling me not to upgrade to sienna, coz it's meant for new sites.. Does this mean the Genoa branch keeps exsisting next to Sienna, or will it eventually be faded out?

Sorry for all the questions, but as I am fairly new to Cotonti, I do not quite understand which way to go with cotonti. I mean, i now have made a skin for Sienna, coz I was convinced that it was nessecary to upgrade to it, and now you tell me different. Which in theory means I have to convert the skin back to Genoa, in order to keep using the full potential of cotonti.
I must say I find it disturbing that this has to be so complicated, not mentioning the time that I have wasted on creating a Sienna skin.