Please post future questions pertaining to HGSS at this thread = The HG/SS Questions Thread
, not really suppose to do this...
Anywho, to answer your question though, it's simple...If you explore Union Cave & Surf, you will come to sort of a crossroads with 2 exits, both lead to the remaining puzzle rooms you speak of...
Lawence Codye's Facebook (Cause I might as well eh?) ------> http://www.facebook.com/lawence.codye
Lawence Codye's Twitter (again, might as well eh?) ------> https://twitter.com/LawenceCodye
3DS Friend Code = 4441 - 9336 - 3527
(Be aware that I must also add you so in order to know you added it, just maybe...)
"The Nine Tails of Subconscious - Lawence Codye"