Joomla 1.5 and mybb

[ancraz]

just have some que i wanted to use Joomla 1.5 with mybb and found a plugin which lets you to do it(jfusion is the plugin name).if i do use it will give any problem when i upgrade from mybb 1.2 to 1.4  
i posted in the Miscellaneous and Off-topic because i thought its place to post it if its not plz move it
and thz