Thanks for the guidance everyone...
Will post my findings so other users down the line may find it as a useful reference maybe
I figured out xbins is still alive and ticking as of may 2017

Really happy to see that.
I remember previously setting up the bios to look for certain dashboards prior to flashing the chip.... I assume now the bios you download is already pre configured and just needs to be flashed, hence no need for the bios prep tools of the past. Just get the bios (read up on compatibilities with different versions of xbox's as well as compatibility with PAL machines. Also check the size of the bios vs your chips available storage for the bios - i am still researching this to find if x2 5035 is compatible with all xbox's if modded with an xecuter chip, size wise the chips can take it) and choose a method to flash the chip.
If you want to play iso files this forum post shows that you can (
http://www.emuxtras.net/forum/viewtopic ... 187&t=3228 ), as long as you run some scripts prior to running the games. Alternatively you can modify your bios to run the scripts at launch of system prior to launching the dashboard (hence you will need a way to modify the bios- dont know which tool to use still - researching this, if anyone knows let me know).
Bioses can be found here:
http://www.eurasia.nu/modules.php?name= ... oad&cid=27
I found Hexen referenced alot on different sites also, available at
http://www.theisozone.com/forum/viewtop ... 31&t=66976
How to Flash:
Basically to flash a chip you can do it using a DVD like Hexen OR Evo-x. If your system boots into a custom dash, you can use Exo-V from your hard drive or via a DVD. Also, if you did not flash your chip previously with a 1mb bios or flash the bank that had this on it originally, you should still have on one of the banks of an xecuter chip a bios called flashbios that allows you to flash a bios on the other chip's bank. Lastly you can flash it using a programmer (if you find one and find a pc you have that has a serial port)... any other ways? these are the ones i could hunt from my research online so far.
As my system boots into a dash, what i will do is use evo-x to flash my bios. Still think i should go with x2 5035 bios, but studying this further ( i have a pal system, so will use the base 5035 not the patched ones for 1080p as those seem to be for ntsc machines mainly - you could change your systems output to ntsc btw, dont know how still though)
I found the bank settings for the 3 executer chips i have. will post them here for anyone else that may need them.
X2.3pro

X2.6

X3
Other resources:
Archive of discontinued products forums team executer (dont know how long this will be online, seems like not long):
http://team-xecuter.com/forums/archive/ ... /f-68.html
reddit has good guidances and tips in the original xbox sub
Hope this will be helpful for someone..