Do I have any other options for interfacing the dreamcast to my Ipac?

[Doom bucket]

http://www.arcadecabinets.co.uk/index.php?page=shop.product_details&flypage=shop.flypage&product_id=17&category_id=6&manufacturer_id=0&option=com_virtuemart&Itemid=26

that looks to be the only way, besides hacking, as far as I know. I could try and hack the dreamcast controllers, but I have a Perfect 360 hooked up so I'm afraid it will be too much of a hassle...

but that's so expensive! And I'll need to buy PS2-to-dreamcast converters, which are both hard to find and also relatively expensive! Is there an option I'm unware of?

[HaRuMaN]

I hack DC controllers all the time, but I don't have a lot of knowlege about the Perfect 360.  What is the reason you couldn't attach the joystick directly to a hacked DC controller?

[ark_ader]

Find yourself a madcatz dreamcast controller.  These are so easy to connect - as the contacts have holes predrilled on the board.  You can connect these up without solder. 

I got mine for £1.50.  Works perfect with Mame4ALL and my happ.

[Doom bucket]

Perfect 360 uses 5 volt connection so I don't know if it would work with a dreamcast controller hack

[jfunk]

HarumaN hooked me up with a dreamcast controller hack that INCLUDED the 5v leads.  Unfortunately, I haven't gotten the chance to put them to use, yet.  But yes, it's possible.    P360s are what I'm planning on using...

[HaRuMaN]

HarumaN hooked me up with a dreamcast controller hack that INCLUDED the 5v leads.  Unfortunately, I haven't gotten the chance to put them to use, yet.  But yes, it's possible.    P360s are what I'm planning on using...

Oh yeah I forgot all about that...