gazza1216...
Q1- Flashing is taking a CF card that has an Audrey image on it, installing it in Audrey's CF card slot, and re-flashing Audrey's memory to the new image. The easiest way to do this is to get a pre-imaged CF card (available from our site or try and borrow one from someone) and follow the instructions included with the CF card or on these forums.
Q2- Using the File Explorer program in most images you can navigate to /data/email/in and delete the messages manually. If you don't have File Explorer you have a couple of options. The one we'd recommend is to flash you Audrey to an image that has File Explorer so you have it in the future if the problem ever comes up again. Again, we have pre-imaged CF cards available from our site, there are also instructions on this forum for putting an image on a CF card yourself, but the procedure is far from easy and can become very frustrating for most people which is why we recommend the pre-imaged CF card. The other option is to borrow a pre-imaged CF card from another Audrey user.
JPA2825...
As for going through shell to delete the messages, it's possible and quite simple if you know what you're doing, but because so much damage can be done by deleting or modifying files that shouldn't be, we'll only post that the files you need to delete are in the /data/email/in directory and if you have the knowledge to delete them in Linux, you'll know how. Aside from that, get a pre-imaged CF card to take care of the problem permanently.
http://AudreyUpgrade.com
