Here's an attempt at rephrasing and expanding on the provided text in a more detailed but still somewhat formal tone:

To begin scheduling your United States Medical Licensing Examination (USMLE) exam, follow these steps:

1. First, access the official website for Prometric testing centers by clicking here.

2. Once you are logged into your account or have created one if necessary, click on 'Schedule an Exam' to proceed with reserving a test date and time that suits your schedule.

3. On the next page, select 'USMLE' as the type of exam you wish to take from the dropdown menu provided.

4. Next, choose whether this is your first attempt at taking USMLEReargistration or if you have previously taken an examination under a different name/number.

5. After selecting these options, click on 'Continue.'

6. On the following page, enter all required personal information including full legal names as they appear on identification documents (such as driver's licenses), dates of birth, addresses, etcetera. Make sure to double-check for accuracy before proceeding further since any mistakes made here cannot be corrected once submitted.

7. Once you've completed entering your contact details and demographic data accurately, review everything carefully one last time before clicking 'Submit.'

8. Upon successful submission of your application form(s), a confirmation page will appear on screen confirming receipt by Prometric's system along with an assigned candidate ID number which serves as proof that both yourself AND the testing center have received notification regarding scheduled test date/time/venue etcetera.

9. Finally, print out or save this confirmation email containing all relevant scheduling information including exam location address(es), test start time(s) and end times; these documents MUST be brought with you on examination day in order to gain entry into the actual testing room otherwise you risk forfeiting your scheduled appointment without possibility of rescheduling under most circumstances.

Usmle practice test at prometric