For each letter, put before its number.
1488 - א - Aleph - no sound of its own
1489 - ב - Beth - b or v
1490 - ג - Gimel - g as in get
1491 - ד - Dalet - d
1492 - ה - Hey - h
1493 - ו - Vav - v or some vowel sounds
1494 - ז - Zayin - z
1495 - ח - Chet - ch as in Loch
1496 - ט - Tet - t
1497 - י - Yod - y
1498 - ך - Kaph Sofit(Final Kaph) - k
1499 - כ - Kaph - k
1500 - ל - Lamed - l
1501 - ם - Mem Sofit(Final Mem) - m
1502 - מ - Mem - m
1503 - ן - Nun Sofit(Final Nun) - n
1504 - נ - Nun - n
1505 - ס - Samek - s
1506 - ע - Ayin - no sound of its own
1507 - ף - Pey Sofit(Final Pey) - p
1508 - פ - Pey - p
1509 - ץ - Tsaddi Sofit- ts(think "rats")
1510 - צ - Tsaddi - ts
1511 - ק - Koph - k
1512 - ר - Resh - r
1513 - ש - Shin - sh or s
1514 - ת - Tav - t or th
If you use these codes to make words, make the code for the first(rightmost) letter first(leftmost), like this:
שלום = שלום
Even if you make more than one word, the leftmost set of codes becomes the rightmost word:
כי לעולם חסדו = כי לעולם חסדו