I´m on Panther. Yes I know it´s 2009!!


Have to wait for SL untill i buy a new Mac.
Now I want to install Tiger on my G5 PPC. as I read DP 7 will run under it too

As I haven´t upgraded my OS for more than 3 years, I´m totally lost and filled with questions.
1. I´m thinking about installing Tiger on the same disc by partioning an clean and new OS disc and copy the OSX Panther clone back to the new disc. I´ll install Tiger on the second partition.
My question: Will I have to reinstall all my plugins, authorizations, software, drivers, Internet configurations etc. on the Tiger disc?
If so: how can I do this the easiest way?
2 Will I be able to run my plugins and software installed on Panther disc when booted from Tiger partition?
Will I be able to use my Panther installed plugins and software when booting from the Tiger partition? Like Toast, Super Duper, Logic 7 etc.
Would I be able to use DP 4.6 that is located on the Panther disc?
3 When I boot from the Tiger disc and install DP 5.13 (upgrade version) do I need to install DP from my "first bought" full DP version or can I reassign it to the Panther partition, where all the other DP versions are installed? Wher do I install the 5.13 version. Panther or Tiger partition?
Anything else I should know and be aware of?
I need your help so make this step the smoothest ever, as I use my system on a professional basis and can´t afford to much down time.