This guide is for MS Outlook Express 6, although it will probably be fine for most other versions of Outlook Express.
The guide assumes you have already set up at least one active e-mail account and can send e-mail.

		Once you have Outlook Express open, click the "Create Mail" button.
		When you have a new e-mail message box open and have entered all the relevant information like the recipient’s address etc, click the "Insert Button" and select "File Attachment".
		You will now be presented with a file selection box and will be able to navigate through your folders and files to find the file you want to attach to your e-mail. You can select any file type to send.
		Once you have navigated to the file you want to attach to your e-mail, select it by clicking once on it and then click the "attach" button.
		The file selection box will now disappear and you will now be able to see the document attached to your e-mail, ready to be sent to the e-mail recipient.
		If you want to remove an e-mail attachment, you will be able to do so easily by right-clicking the file in question and selecting "Remove".

If you want to add additional file attachments to your e-mail, all you need to do is repeat the attachment process again and you'll be able to.