Well guys I want to Re-write my website URLs but there is no option to do so, theres only 1 option to do so and the option is that: make a URL and and redirect it on current link like: mydomain.com/abcd.html rediret to mydomain.com/product565.php is it ok to do so?
Yes, but are you really going to do this for every single URL? What CMS platform are you using? I think they all support URL re-writing by this day in age.
If you're using IIS 7.x you can create redirects in web.config files similar to the way Apache users can create redirects in .htaccess files (Mod_Rewrite). If you manage your own web server and can install software on the server then helicontech.com offers a product called ISAPI Rewrite, which is the IIS equivalent of Mod_Rewrite... it's about 98% compatible.