how to install more than one emu on db800?

[sayed_ahmed43]

I received recently my db800 hd from repair shop, they replaced and update
the image .... Gemini Project 2

I found emus:
CCcam 2.1.3
CCcam 2.1.3 NewCs 1.67
CCcam 2.1.3 MpC3 1.06 pv3
MgCamd 1.31

Please someone tell me
how they installed more than one emu?

how to install more than one emu on db800?
And where to put the reference files?

best wishes