I assume you are referring to the guestbook. You can edit the HTML buy editing the relevant templates, the colours etc are all controlled via the styles section of the admin.
In regards to the mangled headers problem could you please email me the add.class.php file from your guestbooks lib folder. I want to see if they mangled it in the code. If not then it's getting mangled on route.
Any email sent to my hotmail will get rejected as it is set to address book only. I only have the hotmail address for MSN messenger although I should of jst created a passport for my real email address. Send the information to webmaster@carbonize.co.uk if you please.
I refuse to post that information in here. I recommend using my reset script to reset the username and password then goto www.carbonize.co.uk/AG and download the pre-patched session.class.php file. You then just extract the file from the zip and upload it to yoru guestbooks lib folder, overwriting the current one.
As stated in the other thread download www.carbonize.co.uk/reset.php to reset your username and password or if it's not been patched login using the exploit and change it that way.
Now that is something I can understand. I placed a huge plug on my sites most popular page hinting that people actually click the adverts at the side to support the site.
I have never used a host with Cpanel although I think my hosts are going to move me to a nwe server soon. If this is a common problem then I'd say the problem really lies in Cpanel. If you have an example of the mangled headers I'd love to see them. The image problem has lost me. I used to be on a host running Linux and now I am on BSD. Both used Apache and I never had any image problems. I'm wondering if the problem lies in the speed of the server. I'll tinker around to see if I cannot emulate it on my home server.
Default username and password are test and 123 respectively. You can also use www.carbonize.co.uk/reset.zip to reset the username and password to anything you wish.
Not sure about the image problem. What OS is your host running? Windows or Linux?
As to the mail headers they shouldn't be malformed unless there is a problem with your hosts sendmail.
As to the email message it is limited in MySQL to 150 characters but you can go into phpMyAdmin via the cPanel and then goto book_config and alter notify_mes to change it's size from 150. You can also enter your new mssage whilst in there although I cannot see why you need more than 150 characters.