They probably don't know how to answer the question you they just ignored you. So call them up, it's kind of hard to ignore a ringing phone
But on a side note, does it really take
that long for companies to respond? I guess i've only emailed companies known for their tech support. it took Antec 2 days to reply and logitech 1

.
take it from me, I work in the IT field and have to deal with HP, Apple, and Gateway plus all of our vendors on a daily basis...
HP - email maybe 1 week response if I am lucky, phone calls - on hold for over an hour sometimes
Gateway - Phone - on hold usually no longer than 15 minutes - email: about 3 to 5 days
Apple - Can't call support anymore its all online chat, and its practically instant. Only time you can call is if your issue gets escalated to the next tier.
I am certified by all three companies and HP certified on the Enterprise level. The support I call is the ASP (authorized service provider) support, bco (business center operations) support, and self maintainer support. The numbers and emails I have access to are not available to the public, and I am still on hold.
HP has some of the worst departmentilization I have ever seen. Their parts ordering department can't look up part numbers, they can only place orders. So, tech support has to look up the part number for you, then transfer you to parts ordering - LAME
However, I digress, when companies get that big and work on a global scale of course their service is going to suck. I mean they have jerks from all over the globe calling them, emailing them, angry customers wanting to yell at a manager, all the time from everywhere on planet earth. Gateway's service is pretty good, but they want to keep us as customers, however their ASP website is the worst I have ever seen.
Anyways, support is a huge issue and most likely any big company you contact is going to suck. Hell, sony wouldn't ship us parts until we needed several and then shipped them all at once in one box to save money on shipping. Yeah that was really awesome for all my clients, having to wait 6 weeks for a proprietary sized powersupply from sony.