how to upload WordPress 1.2

If you can, ask your host for the ftp details to your site, and use that programme to upload and sort the details.
If they have a script though, and that will assist in dealing with the database creation, I would use it and create a 1.0.2 install, then upgrade it to 1.2
There may be a way using cpanel, but they come in many flavours.

Thanks podz. I think I might prefer uploading 1.2 rather than upgrading (although I may try the latter, if it’s easier.).
So how do I exactly upload? To which directory should I upload? In the readme file of 1.2, it says to modify the wp-config-sample file and save it as wp-config — which details should I modify? Do I need to modify the file even if I haven’t installed wordpress or a wordpress database yet?

First you need to create a mysql database.*
Whatever you call that will be where your wp posts and stuff will go.
Make sure that you know the full database name, that you (the user) has all priviledges, and that your mysql password is correct.
Open wp-config-sample.php, fill in the four items, then save as wp-config.php
Decide where you want your blog to be – at https://www.example.com or https://www.example.com/blog
Upload all the files to where you want them to be, then run the install ??
*If you aren’t sure, ask your host for more information.

I already created a mysql database and uploaded the files, but when i try to run install.php, there’s an error message:
**
We’re having a little trouble selecting the proper database for WordPress.
Are you sure it exists?
Your database name is currently specified as username_blog. Is this correct?
On some systems the name of your database is prefixed with your username, so it would be like username_wordpress. Could that be the problem?
***
username_blog is indeed my database but wordpress can’t seem to recognize it. is there a step i missed like connecting the database to the wordpress folder?