WordPress permalinks Yahoo hosting(no .htaccess allowed)

I have moved a WordPress install to a client from sub folder to the root folder. Right now, everything works fine, except for the friendly URLs. I currently have to set the Permalink feature in “Common settings” to “Default”, which means URLs with ?p=434… At least they work. Otherewise I get a very short 404 not found error message on a white screen. I was following this tutorial, but I found I cannot write an .htaccess to my Yahoo host account and so I could not follow one of the last steps… I wonder if the 404 not found errors have to do with this problem I have had uploading the .htaccess file… I currently do not have any .htaccess file up there… So maybe MOD_REWRITE is disabled… I have just ran phpinfo() and did not find any entry on mod_rewrite. Before moving the website, when it was still on a subfolder, the friendly URLs used to work, but now they don’t. Has anyone came accross this experience and has successfully restablished the permalinks feature?

Any help is appreciated. Thank you.

Yahoo doesn’t allow users access to the htaccess file which means that you can’t the mod_rewrite rules needed for custom permlinks.
The Only way around it that i’ve heard it works (never tried it myself) is to add /index.php/ to the beginning of your custom structure so:
Go to Permalink Settings > Select Custom Structure. And set the value as /index.php/%postname%/
or what ever you want as long as you add /index.php/ before it.

Hope this helps.